用协整？

Good evening buddy,

I assume you'd better use your data to verify your assumption,
not try to find some information to justify your conclusion.

Because, there will always be some surprises.

With limited information,
no one can assure you to get a clear balance point.
Good luck.

Thank you buddy. :)

are you a foreigner

NO.

English OS,
no Chinese input installed.

Sorry for the inconvenience for you.